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Prevent expensive damage to industrial machinery with heavy-duty magnetic contactors from Grainger. The correct contactor type and capacity bridges the gap between direct power sources and high-load electrical lights, heaters and motors, balancing out changes in electrical frequency and cutting the current in the event of a malfunction or overload. Grainger carries a wide range of reversing and non-reversing contactors for use in NEMA, IEC and lighting applications. Whether you need magnetic contactors for a single commercial application or a complex, automated system, count on Grainger to carry them.